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水平定向钻
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水平定向钻
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horizontal directional drilling
水平定向钻
将一个可调向操控的钻头连接在钻杆组的端部,用于地下水平定向钻孔的机具。是在不开挖地表面条件下,铺设多种地下公用设施(管道、电缆等)的施工设备,广泛用于供水、电力、电信、天然气、煤气和石油等管线铺设施工中。
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square-law detection
square-law detector
square line picking
square loss function
squarely equivalent to zero
square mapping
square map subdivision
square matrix
square matrix of order n
square mean value of electric quantities fluctuation
square mean value of thermal electromotive force
square mean velocity of Brownian particle
square measure
square mesh
square mesh grid
Square Mountain and Changyu Dongtian Scenic and Historic Area
squareness
squareness measurement
square net
square number
square of a number
square of opposition
square of order n
square of the distance
square of the standard deviation
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